Plant-heavy diet lowers gut toxin in people with severe kidney disease
Uwatoko R, Sakaguchi Y, Oka T, Doi Y, Kawano Y
Plant Based Diet
The beans, grains, and vegetables you grow in a backyard bed can feed the gut bacteria that make protective fatty acids, and this trial shows the shift can happen within four weeks even in people with advanced kidney disease.
Researchers in Japan gave people with very advanced kidney disease meals where either 70% or 50% of the protein came from plants. After four weeks, the higher-plant group had less of a harmful compound made by gut bacteria, and their gut bacteria shifted toward types that produce helpful fatty acids. Their blood potassium didn't rise, which had been a concern with plant-rich eating for kidney patients.
Key Findings
Serum TMAO dropped significantly in the 70% plant-protein group versus control (difference -4.6 μg/mL, 95% CI -7.2 to -2.0; FDR-adjusted P=0.003).
No significant between-group differences in indoxyl sulfate (-0.8 μg/mL) or p-cresyl sulfate (-0.9 μg/mL); the plant diet raised venous bicarbonate, calcium, and serum acetate while lowering parathyroid hormone.
Pro-inflammatory gut genera decreased and SCFA-producing genera increased, with no significant difference in serum potassium change; 36 patients (median eGFR 13), 94% adherence, 4 weeks.
chevron_right Technical Summary
In a four-week trial of 36 people with severe kidney disease, a diet with 70% of its protein from plants lowered a gut-made toxin called TMAO and shifted gut bacteria in a healthier direction. It also did not raise blood potassium, a common worry with plant-heavy diets in kidney patients.
Abstract Preview
Original paper
Normoproteic Plant-Dominant Protein Diets, Uremic Toxins, and Gut Microbiota in Patients With Advanced CKD: A Randomized Controlled Trial.
Plant-dominant protein diets may ameliorate metabolic disturbances associated with CKD, such as uremia and gut microbiota dysbiosis, although interventional evidence remains limited. This trial inv...
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